Science
Birth of Barbara McClintock
Barbara McClintock was born Eleanor McClintock on June 16, 1902, in Hartford, Connecticut.
Final Issue of the Classic Collection
On June 13, 2002, the USPS issued the final sheet in the Classic Collection Series.
Birth of Florence Nightingale
Nurse and social reformer Florence Nightingale was born on May 12, 1820, in Florence, Tuscany, Italy.
Birth of John J. Audubon
Artist Jean Rabin Audubon (later known as John James Audubon) was born on April 26, 1785, in Les Cayes, Saint-Domingue – today’s Haiti.
Soviet-Canadian Polar Bridge Expedition
On April 25, 1988, the Soviet-Canadian Polar Bridge Expedition reached the North Pole.
Birth of Leonardo da Vinci
Renaissance Man Leonardo da Vinci was born on April 15, 1452, in Vinci, Republic of Florence, Italy.
First Man in Space
On April 12, 1961, Soviet cosmonaut Yuri Gagarin became the first person to travel into space.
The American Chemical Society
On April 6, 1876, the American Chemical Society was founded in New York City.
Happy National Doctors’ Day
March 30 is celebrated as National Doctor’s Day in the United States to commemorate Dr. Crawford W. Long’s use of ether for the first time on this date in 1842.